Cobalt bomb

You may be looking for Cobalt Blue.

A cobalt bomb was an explosive device with greater destructive power than standard nuclear weapon.

A number of advanced races had access to cobalt bombs or the technology to create them. These included

• Cybermen (PROSE: Iceberg ^[+]Loading...["Iceberg (novel)"])
• Daleks (PROSE: Roots of Evil ^[+]Loading...["Roots of Evil (short story)"])
• Greld (PROSE: The Empire of Glass ^[+]Loading...["The Empire of Glass (novel)"])
• Humans (COMIC: The Syntex Mystery ^[+]Loading...["The Syntex Mystery (comic story)"])
• Klytode (COMIC: The Snag Finders ^[+]Loading...["The Snag Finders (comic story)"])
• Qataka (PROSE: Timewyrm: Genesys ^[+]Loading...["Timewyrm: Genesys (novel)"])
• Salonians (PROSE: Planet from Nowhere ^[+]Loading...["Planet from Nowhere (short story)"])
• Waro (PROSE: The Devil Goblins from Neptune ^[+]Loading...["The Devil Goblins from Neptune (novel)"])